microsoft--agent-framework/python/scripts/workspace_poe_tasks.py

# Copyright (c) Microsoft. All rights reserved.

"""Dispatch contributor-facing workspace tasks with consistent scope flags.

This script is the single root-task entrypoint used by ``python/pyproject.toml``.
It keeps selector semantics, aggregate-vs-fan-out behaviour, and compatibility
aliases in one place so docs and automation can share the same command surface.
"""

from __future__ import annotations

import argparse
import hashlib
import subprocess
import sys
from dataclasses import dataclass
from pathlib import Path

import tomli
from packaging.specifiers import SpecifierSet
from packaging.version import Version
from rich import print
from task_runner import (
    build_work_items,
    discover_projects,
    project_filter_matches,
    run_command_items,
    run_tasks,
)

WORKSPACE_ROOT = Path(__file__).resolve().parent.parent
WORKSPACE_PYPROJECT = WORKSPACE_ROOT / "pyproject.toml"
CURRENT_PYTHON = Version(f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}")
SAMPLE_EXCLUDES = "samples/autogen-migration,samples/semantic-kernel-migration"
SAMPLE_RUFF_IGNORE = "E501,ASYNC,B901,TD002"
MARKDOWN_EXCLUDES = [
    "cookiecutter-agent-framework-lab",
    "tau2",
    "packages/devui/frontend",
    "context_providers/azure_ai_search",
    # Excluded from the uv workspace (see python/pyproject.toml); its README imports
    # the package, which is not installed in the workspace env, so Pyright on the
    # snippets cannot resolve it.
    "packages/azure-cosmos-memory",
]
DEFAULT_AGGREGATE_TEST_EXCLUDES = {"devui", "lab"}


@dataclass(frozen=True)
class WorkspaceProject:
    """Metadata about a workspace package."""

    path: Path
    name: str
    distribution_name: str
    requires_python: str | None


def parse_args(argv: list[str]) -> tuple[argparse.Namespace, list[str]]:
    """Parse the workspace command and return any pass-through arguments."""
    parser = argparse.ArgumentParser(description="Dispatch workspace Poe tasks with consistent scope flags.")
    subparsers = parser.add_subparsers(dest="command", required=True)

    def add_project_option(command: argparse.ArgumentParser) -> None:
        command.add_argument(
            "-P",
            "--package",
            dest="project",
            default="*",
            metavar="PACKAGE",
            help="Workspace package selector or glob pattern, such as `core`.",
        )
        # Keep a hidden compatibility alias while old automation and local
        # muscle memory migrate from ``--project`` to ``--package``.
        command.add_argument("--project", dest="project", help=argparse.SUPPRESS)

    def add_syntax_mode_options(command: argparse.ArgumentParser) -> None:
        command.add_argument("-F", "--format", action="store_true", help="Run formatting only.")
        command.add_argument("-C", "--check", action="store_true", help="Run lint checks only.")

    def add_all_option(command: argparse.ArgumentParser) -> None:
        command.add_argument("-A", "--all", action="store_true", help="Run a single aggregate workspace sweep.")

    def add_samples_option(command: argparse.ArgumentParser) -> None:
        command.add_argument("-S", "--samples", action="store_true", help="Target samples/ instead of packages.")

    def add_cov_option(command: argparse.ArgumentParser) -> None:
        command.add_argument("-C", "--cov", action="store_true", help="Enable coverage output.")

    syntax = subparsers.add_parser("syntax")
    add_project_option(syntax)
    add_samples_option(syntax)
    add_syntax_mode_options(syntax)

    for command_name in ("fmt", "build", "clean-dist", "check-packages"):
        command = subparsers.add_parser(command_name)
        add_project_option(command)

    lint = subparsers.add_parser("lint")
    add_project_option(lint)
    add_samples_option(lint)

    pyright = subparsers.add_parser("pyright")
    add_project_option(pyright)
    add_all_option(pyright)
    add_samples_option(pyright)

    mypy = subparsers.add_parser("mypy")
    add_project_option(mypy)
    add_all_option(mypy)

    test_typing = subparsers.add_parser("test-typing")
    add_project_option(test_typing)
    add_all_option(test_typing)
    add_samples_option(test_typing)

    typing = subparsers.add_parser("typing")
    add_project_option(typing)
    add_all_option(typing)

    test = subparsers.add_parser("test")
    add_project_option(test)
    add_all_option(test)
    add_cov_option(test)

    check = subparsers.add_parser("check")
    add_project_option(check)
    add_samples_option(check)

    prek_check = subparsers.add_parser("prek-check")
    prek_check.add_argument("files", nargs="*", default=["."], help="Files reported by pre-commit.")

    subparsers.add_parser("ci-mypy")
    subparsers.add_parser("ci-test-typing")

    return parser.parse_known_args(argv)


def load_toml(file_path: Path) -> dict:
    """Load a TOML file."""
    with file_path.open("rb") as file:
        return tomli.load(file)


def discover_workspace_projects() -> list[WorkspaceProject]:
    """Return workspace packages together with their Python-version metadata."""
    projects: list[WorkspaceProject] = []
    for project_path in discover_projects(WORKSPACE_PYPROJECT):
        pyproject = load_toml(WORKSPACE_ROOT / project_path / "pyproject.toml")
        requires_python = pyproject.get("project", {}).get("requires-python")
        distribution_name = str(pyproject.get("project", {}).get("name", "")).strip()
        projects.append(
            WorkspaceProject(
                path=project_path,
                name=project_path.name,
                distribution_name=distribution_name,
                requires_python=requires_python,
            )
        )
    return projects


def supports_current_python(project: WorkspaceProject) -> bool:
    """Return whether the current interpreter satisfies the project's Python requirement."""
    if not project.requires_python:
        return True
    return SpecifierSet(project.requires_python).contains(CURRENT_PYTHON, prereleases=True)


def select_projects(pattern: str) -> list[WorkspaceProject]:
    """Select supported workspace projects that match the supplied pattern.

    The shared matcher accepts short names such as ``core``, legacy path-style
    values, and distribution names so every root task family speaks the same
    selector dialect.
    """
    matched_projects = [
        project
        for project in discover_workspace_projects()
        if project_filter_matches(project.path, pattern, aliases=[project.name, project.distribution_name])
    ]
    if not matched_projects:
        print(f"[red]No workspace projects matched pattern '{pattern}'.[/red]")
        raise SystemExit(2)

    supported_projects = [project for project in matched_projects if supports_current_python(project)]
    unsupported_projects = [project.name for project in matched_projects if not supports_current_python(project)]
    if unsupported_projects:
        version = f"{sys.version_info.major}.{sys.version_info.minor}"
        print(
            "[yellow]Skipping packages not supported by "
            f"Python {version}: {', '.join(sorted(unsupported_projects))}[/yellow]"
        )

    return supported_projects


def relative_path(path: Path) -> str:
    """Convert a workspace path to a stable relative string."""
    return path.relative_to(WORKSPACE_ROOT).as_posix()


def collect_source_dirs(projects: list[WorkspaceProject]) -> list[Path]:
    """Collect top-level import package directories for the selected projects."""
    source_dirs: set[Path] = set()
    for project in projects:
        project_root = WORKSPACE_ROOT / project.path
        for init_file in project_root.rglob("__init__.py"):
            package_dir = init_file.parent
            if package_dir.name.startswith("agent_framework"):
                source_dirs.add(package_dir)
    return sorted(source_dirs)


def collect_test_dirs(projects: list[WorkspaceProject]) -> list[Path]:
    """Collect test directories for the selected projects."""
    test_dirs: set[Path] = set()
    for project in projects:
        project_root = WORKSPACE_ROOT / project.path
        for directory_name in ("tests", "ag_ui_tests"):
            for test_dir in project_root.rglob(directory_name):
                relative_test_dir = test_dir.relative_to(project_root)
                # Ignore hidden/generated trees such as ``.mypy_cache`` so the
                # aggregate sweep only targets real repository test directories.
                if test_dir.is_dir() and not any(part.startswith(".") for part in relative_test_dir.parts):
                    test_dirs.add(test_dir)
    return sorted(test_dirs)


def run_command(command: list[str]) -> None:
    """Run a subprocess from the workspace root and stream its output."""
    result = subprocess.run(command, cwd=WORKSPACE_ROOT, check=False)
    if result.returncode:
        raise SystemExit(result.returncode)


def run_fan_out(task_names: list[str], project_pattern: str, task_args: list[str]) -> None:
    """Run package-local Poe tasks across the selected projects."""
    selected_projects = select_projects(project_pattern)
    if not selected_projects:
        print("[yellow]No selected projects support the current Python version, skipping.[/yellow]")
        return

    work_items = build_work_items([project.path for project in selected_projects], task_names)
    run_tasks(work_items, WORKSPACE_ROOT, task_args=task_args)


def sample_pyright_config() -> str:
    """Return the sample Pyright configuration for the current interpreter."""
    if sys.version_info < (3, 11):
        return "pyrightconfig.samples.py310.json"
    return "pyrightconfig.samples.json"


def run_sample_lint(extra_args: list[str]) -> None:
    """Run linting against samples/."""
    command = [
        "uv",
        "run",
        "ruff",
        "check",
        "samples",
        "--fix",
        "--exclude",
        SAMPLE_EXCLUDES,
        "--ignore",
        SAMPLE_RUFF_IGNORE,
        *extra_args,
    ]
    run_command(command)


def run_sample_format(extra_args: list[str]) -> None:
    """Run formatting against samples/."""
    command = [
        "uv",
        "run",
        "ruff",
        "format",
        "samples",
        "--exclude",
        SAMPLE_EXCLUDES,
        *extra_args,
    ]
    run_command(command)


def run_sample_pyright(extra_args: list[str]) -> None:
    """Run sample syntax/import validation."""
    command = ["uv", "run", "pyright", "-p", sample_pyright_config(), "--warnings", *extra_args]
    run_command(command)


def run_markdown_code_lint(files: list[str] | None = None) -> None:
    """Run markdown code-block linting globally or for the changed markdown files only."""
    command = [
        "uv",
        "run",
        "python",
        "scripts/check_md_code_blocks.py",
    ]
    if files is None:
        command.extend([
            "README.md",
            "./packages/**/README.md",
            "./samples/**/*.md",
        ])
    else:
        if not files:
            print("[yellow]No markdown files changed, skipping markdown code lint.[/yellow]")
            return
        command.extend(files)
        command.append("--no-glob")

    for excluded_path in MARKDOWN_EXCLUDES:
        command.extend(["--exclude", excluded_path])
    run_command(command)


def run_aggregate_pyright(project_pattern: str, extra_args: list[str]) -> None:
    """Run a single Pyright sweep across the selected project roots."""
    projects = select_projects(project_pattern)
    if not projects:
        print("[yellow]No selected projects support the current Python version, skipping.[/yellow]")
        return

    project_paths = [relative_path(WORKSPACE_ROOT / project.path) for project in projects]
    run_command(["uv", "run", "pyright", *extra_args, *project_paths])


# Type checkers that run over tests (and, where supported, samples). Pyright is the strict
# SOURCE-code checker, and ALSO runs over tests + samples in a relaxed ``basic`` profile
# (see pyrightconfig.tests.json / pyrightconfig.samples.json). mypy/pyrefly/ty/zuban
# exercise the public API the way users do. All five run by default and gate CI. ``zuban``
# is the strictest of the mypy-compatible pair and only runs on tests (samples are
# script-style and unsupported by mypy/zuban -- see SAMPLE_TYPING_CHECKERS).
GATING_TEST_TYPING_CHECKERS = ("mypy", "pyrefly", "ty", "zuban", "pyright")


def _gating_checker_args() -> list[str]:
    """Build ``--checker`` selectors for the CI-gating test/sample checkers."""
    args: list[str] = []
    for checker in GATING_TEST_TYPING_CHECKERS:
        args.extend(["--checker", checker])
    return args


# Samples that are intentionally excluded from type checking (migrations, generated, etc.).
SAMPLE_TYPING_EXCLUDES = (
    "autogen-migration",
    "semantic-kernel-migration",
    "autogen",
    "demos",
    "_to_delete",
    "05-end-to-end",
    "harness",
    "local_telegram",
)


def _mypy_command(paths: list[str], *, samples: bool) -> list[str]:
    # The test-typing fan-out runs many mypy processes concurrently. mypy defaults to a
    # single shared ``.mypy_cache`` in the working directory; concurrent writes corrupt it
    # and mypy aborts with ``INTERNAL ERROR``. Give each invocation an isolated cache dir
    # keyed by its target paths so incremental caching still works per package without races.
    cache_key = hashlib.sha256("\0".join(sorted(paths)).encode()).hexdigest()[:16]
    cache_dir = Path(".mypy_cache") / ("samples" if samples else "tests") / cache_key
    command = [
        "uv",
        "run",
        "mypy",
        "--config-file",
        "pyproject.toml",
        "--cache-dir",
        str(cache_dir),
        "--explicit-package-bases",
        "--namespace-packages",
    ]
    if samples:
        for excluded in SAMPLE_TYPING_EXCLUDES:
            command.extend(["--exclude", excluded])
    command.extend(paths)
    return command


def _zuban_command(paths: list[str], *, samples: bool) -> list[str]:
    command = ["uv", "run", "zuban", "mypy", "--config-file", "pyproject.toml"]
    if samples:
        for excluded in SAMPLE_TYPING_EXCLUDES:
            command.extend(["--exclude", excluded])
    command.extend(paths)
    return command


def _pyrefly_command(paths: list[str], *, samples: bool) -> list[str]:
    config = "pyrefly.samples.toml" if samples else "pyrefly.toml"
    command = ["uv", "run", "pyrefly", "check", "-c", config]
    if samples:
        for excluded in SAMPLE_TYPING_EXCLUDES:
            command.extend(["--project-excludes", f"**/{excluded}/**"])
    command.extend(paths)
    return command


def _ty_command(paths: list[str], *, samples: bool) -> list[str]:
    command = ["uv", "run", "ty", "check"]
    if samples:
        command.extend(["--config-file", "ty.samples.toml"])
        for excluded in SAMPLE_TYPING_EXCLUDES:
            command.extend(["--exclude", f"**/{excluded}/**"])
    command.extend(paths)
    return command


def _pyright_command(paths: list[str], *, samples: bool) -> list[str]:
    # Pyright owns source in strict mode; over tests + samples it runs in a relaxed
    # ``basic`` profile via a dedicated config (see pyrightconfig.tests.json /
    # pyrightconfig.samples.json). CLI paths override the config ``include``; the sample
    # excludes live in the config itself (Pyright has no ``--exclude`` CLI flag).
    config = sample_pyright_config() if samples else "pyrightconfig.tests.json"
    return ["uv", "run", "pyright", "-p", config, *paths]


CHECKER_COMMANDS = {
    "mypy": _mypy_command,
    "zuban": _zuban_command,
    "pyrefly": _pyrefly_command,
    "ty": _ty_command,
    "pyright": _pyright_command,
}


def _resolve_checkers(extra_args: list[str]) -> tuple[list[str], list[str]]:
    """Split a ``--checker NAME`` selector (repeatable) from pass-through args.

    With no explicit ``--checker``, all gating checkers (mypy, pyrefly, ty, zuban,
    pyright) run. A single checker can be isolated via e.g. ``--checker pyright``.
    """
    checkers: list[str] = []
    passthrough: list[str] = []
    index = 0
    while index < len(extra_args):
        argument = extra_args[index]
        if argument == "--checker" and index + 1 < len(extra_args):
            checkers.append(extra_args[index + 1])
            index += 2
            continue
        passthrough.append(argument)
        index += 1
    selected = checkers or list(GATING_TEST_TYPING_CHECKERS)
    unknown = [name for name in selected if name not in CHECKER_COMMANDS]
    if unknown:
        print(f"[red]Unknown checker(s): {', '.join(unknown)}.[/red]")
        raise SystemExit(2)
    return selected, passthrough


def run_test_typing(project_pattern: str, extra_args: list[str]) -> None:
    """Run the test-suite type checkers (mypy, pyrefly, ty, zuban, pyright) per package.

    Each (package, checker) pair is fanned out in parallel via the same executor
    used by the pyright source fan-out, so the presentation and parallelism match.
    """
    checkers, passthrough = _resolve_checkers(extra_args)
    projects = select_projects(project_pattern)
    if not projects:
        print("[yellow]No selected projects support the current Python version, skipping.[/yellow]")
        return

    command_items: list[tuple[str, list[str]]] = []
    for project in projects:
        test_dirs = collect_test_dirs([project])
        if not test_dirs:
            continue
        paths = [relative_path(path) for path in test_dirs]
        for checker in checkers:
            command = CHECKER_COMMANDS[checker]([*paths, *passthrough], samples=False)
            command_items.append((f"{checker} :: {project.name}", command))

    run_command_items(command_items, WORKSPACE_ROOT)


# Checkers that work on the script-style samples tree. MyPy/zuban are excluded because
# samples are standalone scripts (numeric-prefixed dirs, duplicate filenames like main.py)
# that cannot be resolved into a module package tree without per-file invocation. Pyright
# handles the script-style tree fine and runs in the relaxed ``basic`` samples profile.
SAMPLE_TYPING_CHECKERS = ("pyrefly", "ty", "pyright")


def run_sample_typing(extra_args: list[str]) -> None:
    """Run the sample-capable type checkers over samples/ in the relaxed/basic profile."""
    checkers, passthrough = _resolve_checkers(extra_args)
    sample_checkers = [checker for checker in checkers if checker in SAMPLE_TYPING_CHECKERS]
    skipped = [checker for checker in checkers if checker not in SAMPLE_TYPING_CHECKERS]
    if skipped:
        print(f"[yellow]Skipping {', '.join(skipped)} for samples (script-style tree is unsupported).[/yellow]")
    if not sample_checkers:
        return
    command_items = [
        (f"{checker} :: samples", CHECKER_COMMANDS[checker](["samples", *passthrough], samples=True))
        for checker in sample_checkers
    ]
    run_command_items(command_items, WORKSPACE_ROOT)


def run_aggregate_test(project_pattern: str, cov: bool, extra_args: list[str]) -> None:
    """Run a single pytest sweep across the selected project test directories."""
    projects = select_projects(project_pattern)
    if not projects:
        print("[yellow]No selected projects support the current Python version, skipping.[/yellow]")
        return

    if project_pattern == "*":
        # Preserve the legacy ``all-tests`` contract when ``test --all`` runs with
        # the default selector: experimental packages stay opt-in instead of
        # suddenly joining every PR unit-test sweep.
        projects = [project for project in projects if project.name not in DEFAULT_AGGREGATE_TEST_EXCLUDES]
        if not projects:
            print("[yellow]No aggregate-test projects remain after applying default exclusions.[/yellow]")
            return

    test_dirs = [relative_path(path) for path in collect_test_dirs(projects)]
    if not test_dirs:
        print("[yellow]No test directories found for the selected projects, skipping pytest.[/yellow]")
        return

    command = [
        "uv",
        "run",
        "pytest",
        "--import-mode=importlib",
        "-m",
        "not integration",
        "-rs",
        "-n",
        "logical",
        "--dist",
        "worksteal",
    ]
    if cov:
        for source_dir in collect_source_dirs(projects):
            command.append(f"--cov={source_dir.name}")
        command.extend(["--cov-config=pyproject.toml", "--cov-report=term-missing:skip-covered"])

    command.extend(extra_args)
    command.extend(test_dirs)
    run_command(command)


def normalize_changed_file(file_path: str) -> str:
    """Normalize changed-file paths passed from git or pre-commit."""
    normalized = file_path.replace("\\", "/")
    if normalized.startswith("python/"):
        return normalized[7:]
    return normalized


def has_changed_sample_files(files: list[str]) -> bool:
    """Return whether any changed file lives under samples/."""
    return any(normalize_changed_file(file_path).startswith("samples/") for file_path in files)


def changed_markdown_files(files: list[str]) -> list[str]:
    """Return markdown files from the provided change list."""
    markdown_files = [normalize_changed_file(file_path) for file_path in files]
    return sorted({file_path for file_path in markdown_files if file_path.endswith(".md")})


def run_changed_package_tasks(task_names: list[str], files: list[str]) -> None:
    """Run package-local tasks only in packages affected by the provided file list."""
    command = [
        "uv",
        "run",
        "python",
        "scripts/run_tasks_in_changed_packages.py",
        *task_names,
        "--files",
        *files,
    ]
    run_command(command)


def run_prek_check(files: list[str]) -> None:
    """Run the lightweight pre-commit task surface."""
    normalized_files = [normalize_changed_file(file_path) for file_path in files] or ["."]
    run_changed_package_tasks(["fmt", "lint"], normalized_files)
    run_markdown_code_lint(changed_markdown_files(normalized_files))
    if has_changed_sample_files(normalized_files):
        print("[cyan]Sample files changed, running sample checks.[/cyan]")
        run_sample_lint([])
        run_sample_pyright([])
    else:
        print("[yellow]No sample files changed, skipping sample checks.[/yellow]")


def run_ci_test_typing() -> None:
    """Run the gating test/sample type checkers across the workspace, mirroring CI."""
    run_test_typing("*", _gating_checker_args())
    run_sample_typing(_gating_checker_args())


def ensure_no_extra_args(command_name: str, extra_args: list[str]) -> None:
    """Reject unsupported pass-through arguments for commands that do not forward them."""
    if extra_args:
        joined_args = " ".join(extra_args)
        print(f"[red]Command '{command_name}' does not accept extra arguments: {joined_args}[/red]")
        raise SystemExit(2)


def resolve_syntax_modes(*, format_selected: bool, check_selected: bool) -> tuple[bool, bool]:
    """Resolve which syntax steps to run."""
    if not format_selected and not check_selected:
        return True, True
    return format_selected, check_selected


def run_syntax(
    *,
    project_pattern: str,
    samples: bool,
    format_selected: bool,
    check_selected: bool,
    extra_args: list[str],
) -> None:
    """Run formatting and/or lint checking for packages or samples.

    Combined package mode deliberately dispatches ``fmt`` and ``lint`` together
    so the shared task runner can start both legs in parallel.
    """
    run_format, run_check = resolve_syntax_modes(
        format_selected=format_selected,
        check_selected=check_selected,
    )
    if run_format and run_check and extra_args:
        joined_args = " ".join(extra_args)
        print(
            "[red]Extra arguments are only supported when syntax runs a single mode; "
            f"use either --format or --check with: {joined_args}[/red]"
        )
        raise SystemExit(2)

    if samples and project_pattern != "*":
        print("[red]--samples cannot be combined with --package.[/red]")
        raise SystemExit(2)

    format_args = extra_args if run_format and not run_check else []
    check_args = extra_args if run_check and not run_format else []

    if samples:
        if run_format:
            run_sample_format(format_args)
        if run_check:
            run_sample_lint(check_args)
        return

    if run_format and run_check:
        # Fan out both legs in one call so task_runner can parallelize format
        # and lint work across the same selected package set.
        run_fan_out(["fmt", "lint"], project_pattern, [])
        return

    if run_format:
        run_fan_out(["fmt"], project_pattern, format_args)
    if run_check:
        run_fan_out(["lint"], project_pattern, check_args)


def main() -> None:
    """Dispatch the requested workspace task."""
    args, extra_args = parse_args(sys.argv[1:])

    if args.command == "syntax":
        run_syntax(
            project_pattern=args.project,
            samples=args.samples,
            format_selected=args.format,
            check_selected=args.check,
            extra_args=extra_args,
        )
        return

    if args.command == "fmt":
        run_syntax(
            project_pattern=args.project,
            samples=False,
            format_selected=True,
            check_selected=False,
            extra_args=extra_args,
        )
        return

    if args.command == "lint":
        if args.samples:
            run_syntax(
                project_pattern=args.project,
                samples=True,
                format_selected=False,
                check_selected=True,
                extra_args=extra_args,
            )
            return
        run_syntax(
            project_pattern=args.project,
            samples=False,
            format_selected=False,
            check_selected=True,
            extra_args=extra_args,
        )
        return

    if args.command == "pyright":
        if args.samples:
            if args.all or args.project != "*":
                print("[red]--samples cannot be combined with --all or --package.[/red]")
                raise SystemExit(2)
            run_sample_pyright(extra_args)
            return
        if args.all:
            run_aggregate_pyright(args.project, extra_args)
            return
        run_fan_out(["pyright"], args.project, extra_args)
        return

    if args.command == "mypy":
        # MyPy no longer runs on source code (Pyright owns source). The ``mypy`` task is a
        # convenience alias that runs MyPy over the test suite.
        run_test_typing(args.project, ["--checker", "mypy", *extra_args])
        return

    if args.command == "test-typing":
        if args.samples:
            if args.all or args.project != "*":
                print("[red]--samples cannot be combined with --all or --package.[/red]")
                raise SystemExit(2)
            run_sample_typing(extra_args)
            return
        run_test_typing(args.project, extra_args)
        return

    if args.command == "typing":
        ensure_no_extra_args(args.command, extra_args)
        # Pyright over source, then the multi-checker sweep over the tests.
        if args.all:
            run_aggregate_pyright(args.project, [])
        else:
            run_fan_out(["pyright"], args.project, [])
        run_test_typing(args.project, [])
        return

    if args.command == "test":
        if args.all:
            run_aggregate_test(args.project, args.cov, extra_args)
            return
        run_fan_out(["test"], args.project, extra_args)
        return

    if args.command == "build":
        ensure_no_extra_args(args.command, extra_args)
        run_fan_out(["build"], args.project, [])
        return

    if args.command == "clean-dist":
        ensure_no_extra_args(args.command, extra_args)
        run_fan_out(["clean-dist"], args.project, [])
        return

    if args.command == "check-packages":
        ensure_no_extra_args(args.command, extra_args)
        run_syntax(
            project_pattern=args.project,
            samples=False,
            format_selected=False,
            check_selected=False,
            extra_args=[],
        )
        run_fan_out(["pyright"], args.project, [])
        return

    if args.command == "check":
        ensure_no_extra_args(args.command, extra_args)
        if args.samples:
            if args.project != "*":
                print("[red]--samples cannot be combined with --package.[/red]")
                raise SystemExit(2)
            run_syntax(
                project_pattern="*",
                samples=True,
                format_selected=False,
                check_selected=False,
                extra_args=[],
            )
            run_sample_typing(_gating_checker_args())
            return
        run_syntax(
            project_pattern=args.project,
            samples=False,
            format_selected=False,
            check_selected=False,
            extra_args=[],
        )
        run_fan_out(["pyright"], args.project, [])
        run_test_typing(args.project, _gating_checker_args())
        run_fan_out(["test"], args.project, [])
        # Sample validation and markdown lint are intentionally workspace-wide;
        # a package-scoped check should stay focused on the selected package set.
        if args.project == "*":
            run_syntax(
                project_pattern="*",
                samples=True,
                format_selected=False,
                check_selected=False,
                extra_args=[],
            )
            run_sample_typing(_gating_checker_args())
            run_markdown_code_lint()
        return

    if args.command == "prek-check":
        ensure_no_extra_args(args.command, extra_args)
        run_prek_check(args.files)
        return

    if args.command in ("ci-mypy", "ci-test-typing"):
        ensure_no_extra_args(args.command, extra_args)
        run_ci_test_typing()
        return

    print(f"[red]Unsupported command: {args.command}[/red]")
    raise SystemExit(2)


if __name__ == "__main__":
    main()